Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income attributable to common shareowners:
Income (loss) from continuing operations attributable to common shareowners	$ 151	$ 958	$ (3,255)	$ 2,853
Income (loss) from discontinued operations attributable to common shareowners	113	190	(399)	1,541
Net income attributable to common shareowners	$ 264	$ 1,148	$ (3,654)	$ 4,394
Basic weighted average number of shares outstanding	1,511.5	855.1	1,311.3	854.2
Stock awards and equity units	2.7	9.0	0.0	8.7
Diluted weighted average number of shares outstanding	1,514.2	864.1	1,311.3	862.9
Earnings (Loss) Per Share attributable to common shareowners - Basic:
Income (loss) from continuing operations	$ 0.10	$ 1.12	$ (2.48)	$ 3.34
Income (loss) from discontinued operations	0.08	0.22	(0.30)	1.80
Earnings Per Share, Basic	0.17	1.34	(2.79)	5.14
Earnings (Loss) Per Share attributable to common shareowners - Diluted:
Income (loss) from continuing operations	0.10	1.11	(2.48)	3.31
Income (loss) from discontinued operations	0.08	0.22	(0.30)	1.78
Earnings Per Share, Diluted	$ 0.17	$ 1.33	$ (2.79)	$ 5.09
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	38.1	8.0	31.5	11.0